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Consensys and digital signature solution provider eMudhra team jointly issued a security warning, pointing out that Ethereum operators face risks when using the eMudhra signing solution. The team discovered vulnerabilities in some Java trust stores, and certain configurations could lead to exposure risks.According to the disclosure, the default settings are unaffected, but some Web3Signer deployments require immediate changes to access controls. Web3Signer is an open-source remote signing tool developed by Consensys, commonly used for key management in networks such as Ethereum.

Due to the ChainSecurity report revealing compatibility and security issues with EIP-8037 and certain smart contracts, core developers decided last week to postpone the Hoodi testnet upgrade to Glamsterdam. The issues identified so far include: the remaining Gas during transaction execution may increase, leading to underflow in some Gas counting logic and triggering rollbacks, or causing code paths that should not be executed to be triggered, making the transaction appear successful. Additionally, some contracts may underestimate usage due to the inability to correctly calculate Gas consumption during calls.ChainSecurity previously stated that 13 real cases have been identified and they are responsibly disclosing this information to the affected projects. Toni Wahrstätter mentioned that this week they will further investigate the relevant contracts and assess subsequent solutions, which may require collaboration among application developers, core developers, auditors, and node operators. In the worst-case scenario, adjustments to the protocol specifications may be necessary. He reminded application developers and auditors to check the compatibility of contracts with EIP-8037 and EIP-8038 and to report issues in a timely manner.

Google DeepMind researchers Zhengxuan Wu, Yuxuan Li, Oyvind Tafjord, and Been Kim released a preprint paper titled "XYEval: Agents say yes to bad advice," proposing a meta-evaluation framework XYEval to assess the performance of agents when faced with misleading suggestions from users. The paper extends the "XY problem" to the agent scenario, where the user inquires about their attempted solution X rather than the actual problem Y.XYEval retains the original task environment and verifiable answers, only adding seemingly reasonable but misleading user suggestions in the instructions. The misleading suggestions are generated by a generator after seeing the complete task and are appended in the form of confident suggestions rather than hard requirements, allowing the original task to remain solvable. The evaluation covers six benchmarks: τ2-bench, SWE-bench Verified, SWE-bench Pro, Terminal-Bench, Humanity's Last Exam, and MCP-Atlas, along with five models, where the misleading suggestions for τ2-bench are generated based on rules set by human experts.The paper states that the performance significantly declines after the XY mutation, with the relative drop reaching up to 46.7%. On τ2-bench, when faced with users who require a detailed explanation before accepting a better solution, the performance drops even more. Encouraging models to recognize the XY problem through simple system instructions only partially alleviates the issue. The related code is published in the GitHub repository google-deepmind/xyeval.

According to Onchain Lens monitoring, the Ethereum Foundation exchanged 2,785 ETH for USDS through CoWSwap, with a transaction amount of approximately 6.42 million USD.

According to on-chain data monitoring, due to the sharp decline in the cryptocurrency market last night, Brother Ma Ji Huang Li Cheng's 25x Ethereum long position was completely liquidated this morning, resulting in a net loss of over 180,000 USD. However, Brother Ma Ji subsequently re-entered the market to open a long position and made a small additional investment. Currently, he holds only 115 ETH, with a position value of approximately 269,000 USD, and the current liquidation price is 2,316 USD.

According to Salus monitoring, Tether has blacklisted 9 addresses related to the CoinDCX security incident and frozen 2,212,850.3 USDT.The investigation began when investigator Darcy discovered an unusual transfer of approximately 15.99 million USDT. CoinDCX co-founder Sumit Gupta initially claimed that no security breach had occurred. Subsequently, Salus raised questions based on the transfer situation of the "proof of reserves" addresses and the TRX distribution pattern, prompting the parties involved to respond and providing Tether with verifiable on-chain evidence, allowing it to take appropriate action.

According to on-chain data, due to the decline in the cryptocurrency market, the 25x Ethereum long position held by Huang Licheng's address has been completely liquidated again. Currently, there are only 5,357 USD in assets remaining in his address, with a total loss exceeding 35.37 million USD.

Digital asset company Tether announced that 15 Bitcoin mining companies, ASIC manufacturers, and mining pools have committed to jointly build and maintain the integration of its open-source mining development kit, MDK. MDK aims to unify the access methods of different mining infrastructures, supporting developers in building applications and AI automation systems.Participants will develop and maintain the MDK Worker, converting their respective hardware, mining pools, or system interfaces into a universal interface; there is no need to replace existing technology, and they can also decide which functions to open. Existing applications can access different mining environments through MDK. Tether's QVAC mining proxy has accessed mining infrastructure through MDK. Version 0.11 of MDK will be released at the Lugano Plan ₿ Forum, with the first stable version 1 planned for launch by the end of 2026.

Aave executed an adjustment to the USDT lending rate parameters in the Ethereum Core market at block height 26,241,799, lowering the rate inflection point from 94% utilization to 92%, causing borrowing costs to rise earlier when liquidity in the pool tightens. The new parameters are: optimal utilization rate 92%, base rate 0, first slope 4.5%, second slope 10%; the inflection point rate is 4.5% APR, reaching 14.5% APR when utilization hits 100%.At 94% utilization, the old curve's lending rate was 4.5% APR, while the new curve is 7% APR, an increase of 2.5 percentage points. LlamaRisk recommended the adjustment on October 20; based on a supply of 2.8922 billion USDT, a 92% utilization rate leaves approximately 57.84 million USDT unborrowed as a buffer compared to 94%. This buffer does not represent actual cash, and withdrawals still depend on available unborrowed liquidity. Snapshots show that the actual cash in the pool is about 391.4 million USDT, with a variable lending APR of about 4.23% and a supply liquidity APR of 3.29%.

U.S. Senator Richard Blumenthal has launched an investigation into the payment of approximately $6.3 million by the stablecoin issuer Tether to the consulting firm Nxum. Nxum was co-founded by former White House cryptocurrency advisor Bo Hines, who holds one-third of the company's shares. On October 22, Blumenthal sent a letter to Tether CEO Paolo Ardoino, requesting the contracts between the two parties, cryptocurrency payment records, wallet addresses, and communication content.Tether is accused of paying Nxum $415,000 per month since May 2025 for strategic communications, lobbying, and public relations services. Blumenthal pointed out that Bo Hines, while serving as the executive director of the White House Digital Assets Advisory Committee, still held shares in Nxum and coordinated affairs with the company through encrypted communication applications. He also questioned whether Tether transferred cryptocurrency through the marketing company Notorious and then allocated funds to Nxum shareholders. Tether began directly contracting with Nxum after August 2025 and hired Bo Hines to oversee the newly established U.S. operations. Blumenthal has requested that Tether, Nxum, and related parties respond by November 6, noting that the relevant allegations have not yet formed a legal determination, and Tether has not publicly responded.

ether.fi announced the acquisition of the cryptocurrency wallet Zeal Wallet. Zeal users can currently migrate directly within the Zeal app to ether.fi.After the migration, users can utilize the lending, yield, stock, and gold trading services provided by ether.fi. This announcement has not yet disclosed the specific acquisition amount and transaction terms.

The official announcement from the Chicago Mercantile Exchange reported that the business data for the third quarter of 2026 showed revenue reaching 1.737 billion USD, a year-on-year increase of approximately 13%, setting a new record for the third quarter; net profit was about 1 billion USD.During the same period, the average daily trading volume of all CME products reached 29.4 million contracts, with the average daily trading volume of cryptocurrency derivatives at approximately 196,000 contracts, and the nominal trading volume for the quarter was about 469.5 billion USD. Among them, the nominal trading volume for Bitcoin and Ethereum derivatives was 326.7 billion USD and 118.8 billion USD, respectively.

Binance founder Zhao Changpeng stated, "I am often asked whether my entrepreneurial ideas are feasible, as if my opinion is that important. As long as the team's execution ability is strong enough, 99% of ideas are good.The problem is that 98% of teams cannot execute effectively. Therefore, there is no need to promote entrepreneurial ideas; just demonstrate execution ability."

CoinGecko's report on the cryptocurrency industry for the third quarter of 2026 shows that the total market capitalization of cryptocurrencies increased by 39.6% quarter-on-quarter, rising by $840.1 billion to approximately $3 trillion, ending three consecutive quarters of decline and marking the largest quarterly increase since the fourth quarter of 2024. However, the total market capitalization is still down 4% year-to-date.In terms of mainstream assets, Ethereum (ETH) rose 71% in the quarter to $2,684, outperforming Bitcoin and other major cryptocurrencies, with net inflows into spot ETH ETFs reaching $3.1 billion for the quarter. Hyperliquid (HYPE) surged to an all-time high of $98, driven by favorable regulatory news in the U.S., with a quarterly increase of 40.5%. Meanwhile, trading activity failed to keep pace with the price rebound. The average daily trading volume in the cryptocurrency market decreased by 8.6% quarter-on-quarter to $73.3 billion, while the spot trading volume of the top ten centralized exchanges fell by 14.2% to $1.65 trillion. Binance's spot market share rose to 42.7%, up from 38.7% in the second quarter; the total open interest in perpetual contracts on centralized exchanges grew by 40.6% quarter-on-quarter, surpassing $100 billion at the end of the quarter for the first time since the third quarter of 2025.

According to Rootdata, yesterday (Eastern Time October 22), the total net outflow of Ethereum spot ETFs was $111 million.The Ethereum spot ETF with the highest net outflow on that day was BlackRock ETF ETHA, with a net outflow of $75.5 million. As of that trading day, ETHA has a historical cumulative net inflow of $12.279 billion.Following that was BlackRock ETF ETHB, with a net outflow of $17.2 million. As of that trading day, ETHB has a historical cumulative net inflow of $822 million.

According to Rootdata, on October 21, 2026 (Eastern Time), the total net inflow of Ethereum spot ETFs for the day was $14.9 million.The Ethereum spot ETF with the highest net inflow for the day was Grayscale Ethereum Trust ETF ETH, with a net inflow of $28.1 million.Following that was Fidelity ETF FETH, with a net inflow of $13 million.

According to monitoring data from Arkham, the ether.fi team marked an address that transferred 3.5 million ETHFI to address 0xB20 again, worth approximately 2.28 million USD.This address received 1.255 million ETHFI about 12 months ago, suspected to be a smart contract address with an associated vesting unlock feature, which means that ether.fi currently has nearly 5 million ETHFI available for free disposal and has not yet been staked.

Tether-supported Utexo has now opened early access to Utexo Mint, allowing professional operators to test the cross-chain version of USDT on the Bitcoin Signet (Bitcoin testnet), with the official launch date set for November 28.In the Bitcoin Signet sandbox environment, operators can test minting, privacy transfers, and redemption functions. Utexo will also provide related tools for managing cross-network liquidity and facilitating exchanges between fiat currency and the Utexo cross-chain version of USDT. According to previous news, Tether-supported Utexo plans to issue USDT on the Bitcoin network this month, supporting privacy transfers and direct exchanges with BTC.

According to SoSoValue data, the total net outflow of Ethereum spot ETFs is $111 million. The Ethereum spot ETF with the highest net inflow in a single day is Fidelity ETF FETH, with a single-day net inflow of $2.3729 million. Currently, the historical total net inflow of FETH has reached $2.357 billion.The Ethereum spot ETF with the highest net outflow in a single day is Blackrock ETF ETHA, with a single-day net outflow of $75.4543 million. Currently, the historical total net inflow of ETHA has reached $12.261 billion. As of the time of writing, the total net asset value of Ethereum spot ETFs is $14.571 billion, and the ETF net asset ratio (the market value as a percentage of Ethereum's total market value) is 5.01%. The historical cumulative net inflow has reached $12.715 billion.